Let X be a metric space, f∈ C0(X), and V X. The set-trajectory ( V, f( V),…,fn(V)) is investigated and some conditions for f to have periodic points with given periods are obtained.
基金the Special Foundation of National Prior Basic Researches of China ( Grant No. G1999075108).
文摘Let X be a metric space, f∈ C0(X), and V X. The set-trajectory ( V, f( V),…,fn(V)) is investigated and some conditions for f to have periodic points with given periods are obtained.
